NO149217B - SLIDING SEAL FOR THE SHIFT OF A CENTRIFUGAL PUMP - Google Patents
SLIDING SEAL FOR THE SHIFT OF A CENTRIFUGAL PUMP Download PDFInfo
- Publication number
- NO149217B NO149217B NO771185A NO771185A NO149217B NO 149217 B NO149217 B NO 149217B NO 771185 A NO771185 A NO 771185A NO 771185 A NO771185 A NO 771185A NO 149217 B NO149217 B NO 149217B
- Authority
- NO
- Norway
- Prior art keywords
- shaft
- impeller
- bellows
- sleeve
- pressure
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 3
- 239000011324 bead Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/36—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member connected by a diaphragm or bellow to the other member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Sealing (AREA)
Description
Oppfinnelsen vedrører en glideringtetning for v akselen til en sentrifugalpumpe, hvor i et tetningskammer i pumpehuset akselen i tillegg til en akselen omsluttende og med akselen roterende hylse er omgitt av en med akselen roterende, utad hvelvet elastisk belg, hvis ene ende er avtettet mot løpehjultrykket og hvis andre ende over en glidering ligger tettende an mot en stasjonær glidering på huset. The invention relates to a slip ring seal for the v shaft of a centrifugal pump, where in a sealing chamber in the pump housing the shaft, in addition to a sleeve surrounding the shaft and rotating with the shaft, is surrounded by an outwardly domed elastic bellows rotating with the shaft, one end of which is sealed against the impeller pressure and whose other end above a sliding ring rests tightly against a stationary sliding ring on the housing.
Hensikten med foreliggende oppfinnelse er å ut-forme den ovennevnte glideringtetning slik at konstruksjonen bare krever forholdsmessig få deler, med unngåelse av deler som lett kan forstyrres eller ødelegges, såsom i den elastiske belg innleirede hårddeler, samtidig som man også skal være sikret et jevnt tetningstrykk selv ved vekslende turtall, hvorved glideringtetningen får større driftsstikkerhet og lengre levetid. The purpose of the present invention is to design the above-mentioned sliding ring seal so that the construction only requires relatively few parts, with the avoidance of parts that can be easily disturbed or destroyed, such as hard parts embedded in the elastic bellows, while also ensuring a uniform sealing pressure even at varying speeds, whereby the mechanical seal gets greater operational reliability and a longer service life.
Kjente glideringtetninger løser ikke denne oppgave helt. Således "er det eksempelvis kjent en i et kammer i pumpehuset anordnet glideringtetning (GB-PS 1 008 597), hvor den ene glidering er stasjonær i kammerveggen, mens den andre, forskyvbare glidering er anbragt på den mot løpehjulet vendte ende av en i hovedsaken sylindrisk belg. Belgen roterer med pumpeakselen og er med sin ene ende montert på løpehjulsiden ved hjelp av en endevulst og en i vinkelen mellom kraven hen-holdsvis vulsten og belgens ytterside anordnet ring. Dessuten omgis belgen av en hylse av et stoff med en hård struktur. I Glideringtetningen er tilstrekkelig, fordi for det første presstrykket mot løpehjulet ikke vil være stort nok, og for det andre fordi ringen representerer et hård fremmedlegeme, dvs. en kilde til beskadigelse av belgen. Dessuten vil heller ikke tetningstrykket hele tiden være jevnt. Known sliding ring seals do not solve this task completely. Thus, for example, a sliding ring seal arranged in a chamber in the pump housing is known (GB-PS 1 008 597), where one sliding ring is stationary in the chamber wall, while the other, displaceable sliding ring is placed on the end facing the impeller of an in the main body cylindrical bellows. The bellows rotates with the pump shaft and is mounted with one end on the impeller side by means of an end bead and a ring arranged in the angle between the collar or the bead and the outer side of the bellows. In addition, the bellows is surrounded by a sleeve of a material with a hard structure .I The sliding ring seal is sufficient, because firstly the pressing pressure against the impeller will not be great enough, and secondly because the ring represents a hard foreign body, i.e. a source of damage to the bellows.Also, the sealing pressure will not be uniform all the time.
Anordningen av en utad hvelvet belg for utøvelse av et tetningstrykk ved innbyrdes roterende deler i sentrifugal-pumper er kjent, se eksempelvis US-PS 2 671 407 og NO-PS 86 540. I US-PS 2 671 407 er det dessuten også anordnet en fjær for ut-øvelse av et trykk, og denne fjæren representerer en kilde til forstyrrelser. The arrangement of an outwardly vaulted bellows for exerting a sealing pressure by mutually rotating parts in centrifugal pumps is known, see for example US-PS 2 671 407 and NO-PS 86 540. In US-PS 2 671 407 there is also arranged a spring for the exercise of a pressure, and this spring represents a source of disturbance.
Ifølge oppfinnelsen oppnår man den hensikt som According to the invention, the purpose is achieved
er lagt til grunn for oppfinnelsen derved at den nevnte, med akselen roterende hylse på sin mot løpehjulet vendte ende er utvidet for dannelse av et ringrom eller en ringspalte rundt akselen, at denne utvidede hylseende griper inn i en ved inn-retting av hosliggende helgende dannet lomme, med anlegg mot lommens bunn, at ombrettingens ytterflate ligger an mot løpe-hjulets bakside, og ved at tetningskammeret på i og for seg kjent måte pådras pumpevæskens transporttrykk. is the basis of the invention in that the said sleeve, which rotates with the shaft, is expanded on its end facing the impeller to form an annular space or an annular gap around the shaft, that this expanded sleeve end engages in an alignment of the adjacent solid end formed pocket, with abutment against the bottom of the pocket, that the outer surface of the rim rests against the rear of the impeller, and that the sealing chamber is exposed to the transport pressure of the pump fluid in a manner known per se.
En slik glideringtetning består av forholdsmessig få deler som alle har enkel formgivning. Delene er ikke særlig utsatt for forstyrrelser eller beskadigelser, og belg og aksel-hylse er ved løpehjulet på sett og vis sammenfattet til en en-het, noe som gir en god tetning, såvel innenfra som utenfra, idet akselhylsen har det nevnte inngrep i en aksial lomme i belgen, idet den på belgenden dannede lommerygg trykkes mot baksiden av løpehjulet. Kammeret rundt belgen eller tetningen står under samme trykk som pumpevæskens transporttrykk, og dette gir en trykk-kompensering. Den roterende belg vil , nemlig utsettes for sentrifugalkrefter som vil tendere til å gi en avkorting av belgens lengde, hvorved det elastiske glideringtrykk vil avta. Med voksende turtall øker imidler-tid trykket på utsiden av belgen i tetningskammeret, og dette motvirker sentrifugalkreftenes innflytelse. Begge de krefter som her virker endrer seg i hovedsaken proporsjonalt med kvadratet av turtallet, og derved oppnås en kompensasjon for sentrifugalkreftene, slik at man i hovedsaken kan opprettholde eller oppnå et jevnt trykk mellom glideringene. Such a sliding ring seal consists of relatively few parts, all of which have a simple design. The parts are not particularly susceptible to disturbances or damage, and the bellows and shaft sleeve are, in a sense, combined into one unit by the impeller, which provides a good seal, both from the inside and the outside, as the shaft sleeve has the aforementioned engagement in a axial pocket in the bellows, as the pocket ridge formed at the end of the bellows is pressed against the rear of the impeller. The chamber around the bellows or seal is under the same pressure as the transport pressure of the pump fluid, and this provides a pressure compensation. The rotating bellows will, namely, be exposed to centrifugal forces which will tend to shorten the length of the bellows, whereby the elastic sliding ring pressure will decrease. With increasing speed, however, the pressure on the outside of the bellows in the sealing chamber increases, and this counteracts the influence of the centrifugal forces. Both of the forces that act here change mainly proportionally to the square of the speed, and thereby a compensation is achieved for the centrifugal forces, so that you can mainly maintain or achieve a uniform pressure between the sliding rings.
Ved at glideringene anordnes på den fra løpehjulet vendte side kan pumpens løpehjul fordelaktig fremstilles av et egnet kunststoff, uten fare for at varme som utvikles vil kunne påvirke kunststoffet. By arranging the sliding rings on the side facing away from the impeller, the pump's impeller can advantageously be made of a suitable plastic, without the risk that the heat that develops will affect the plastic.
Oppfinnelsen skal beskrives nærmere under hen-visning til tegningen som viser et snitt gjennom en glideringtetning ifølge oppfinnelsen. The invention shall be described in more detail with reference to the drawing which shows a section through a sliding ring seal according to the invention.
Et løpehjul 3 er montert på en aksel 1 i et pumpe-hus 2. Løpehjulet er fremstilt av et termoplastisk kunststoff. An impeller 3 is mounted on a shaft 1 in a pump housing 2. The impeller is made of a thermoplastic material.
Akselen 1 går gjennom et tetningskammer 4 i pumpehuset 2. The shaft 1 passes through a sealing chamber 4 in the pump housing 2.
Mellom tetningskammerets deksel 16 og løpehjulet 3 er det i kammeret 4 anordnet en glideringtetning. Således er det på akselen 1 anordnet en hylse 5 som roterer med akselen 1. Hylsens mot løpehjulet 3 vendte ende har et parti med utvidet diameter, slik at det mellom akselen og hylsen her dannes et ringrom eller en ringspalte 7. Slangen eller belgen 8, som omgir akselen, er på den mot løpehjulet 3 vendte ende brettet innover for dannelse av en lomme hvori hylsens utvidede ende griper inn. Ombrettingens ytre flate eller rygg 10 ligger tettende an mot løpehjulets bakside i navområdét. Slangen eller belgen roterer med akselen 1 og løpehjulet 3. Between the sealing chamber's cover 16 and the impeller 3, a sliding ring seal is arranged in the chamber 4. Thus, a sleeve 5 is arranged on the shaft 1 which rotates with the shaft 1. The end of the sleeve facing the impeller 3 has a part with an enlarged diameter, so that between the shaft and the sleeve an annular space or an annular gap 7 is formed. The hose or bellows 8, which surrounds the shaft, on the end facing the impeller 3 is folded inward to form a pocket in which the expanded end of the sleeve engages. The outer surface or ridge 10 of the ombretting rests tightly against the back of the impeller in the hub area. The hose or bellows rotates with the shaft 1 and the impeller 3.
Belgens andre ende 11 er påsatt en tetningsring 12. Tetningsringen har for dette formål et ringspor med ut-ad konisk utvidet tverrsnitt. Tetningsringens 12 andre ende-flate 14 ligger an mot en tetningsring 15 som er stasjonært anordnet i kammerdekselet 16. The other end 11 of the bellows is fitted with a sealing ring 12. For this purpose, the sealing ring has an annular groove with an outwardly conical widened cross-section. The other end surface 14 of the sealing ring 12 rests against a sealing ring 15 which is stationary arranged in the chamber cover 16.
Slangen eller belgen 8 har den antydede tønneform og påvirkes på sin utside av trykket til pumpemediet, idet dette trykk pådras gjennom kanalen 17. The hose or bellows 8 has the indicated barrel shape and is affected on its outside by the pressure of the pumping medium, as this pressure is applied through the channel 17.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2615743A DE2615743C2 (en) | 1976-04-10 | 1976-04-10 | Mechanical seal for the shaft of centrifugal pumps |
Publications (3)
Publication Number | Publication Date |
---|---|
NO771185L NO771185L (en) | 1977-10-11 |
NO149217B true NO149217B (en) | 1983-11-28 |
NO149217C NO149217C (en) | 1984-03-07 |
Family
ID=5975033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO771185A NO149217C (en) | 1976-04-10 | 1977-04-04 | SLIDING SEAL FOR THE SHIFT OF A CENTRIFUGAL PUMP |
Country Status (12)
Country | Link |
---|---|
AT (1) | AT348873B (en) |
BE (1) | BE853109A (en) |
CH (1) | CH620970A5 (en) |
DE (1) | DE2615743C2 (en) |
DK (1) | DK143146C (en) |
FI (1) | FI64449C (en) |
FR (1) | FR2347589A1 (en) |
GB (1) | GB1535678A (en) |
IT (1) | IT1084470B (en) |
NL (1) | NL7703793A (en) |
NO (1) | NO149217C (en) |
SE (1) | SE429466B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2909933A1 (en) * | 1979-03-14 | 1980-09-25 | Maschf Augsburg Nuernberg Ag | DEVICE FOR COOLING AND RINSING THE AXIAL GASKET FOR A LEAF WHEEL OF WATER PUMPS |
FR2503822B1 (en) * | 1981-04-10 | 1985-08-09 | Cefilac | DYNAMIC SEAL FOR SEALING A SHAFT THROUGH A WALL |
US4621975A (en) * | 1984-10-25 | 1986-11-11 | Graco Inc. | Centrifugal pump seal |
US6929449B2 (en) * | 2003-04-25 | 2005-08-16 | Electro-Motive Diesel, Inc. | Diesel engine water pump with improved oil control |
CN103352873B (en) * | 2013-07-30 | 2016-04-13 | 强胜精密机械(苏州)有限公司 | The spiral flow constant-pressure pump improved |
DE102015216192A1 (en) * | 2015-08-25 | 2017-03-02 | Magna Powertrain Bad Homburg GmbH | Assembly with mechanical seal |
JP2020041470A (en) * | 2018-09-10 | 2020-03-19 | トヨタ自動車株式会社 | compressor |
CN109611374A (en) * | 2019-01-14 | 2019-04-12 | 北京星际荣耀空间科技有限公司 | A kind of cryogenic liquid rocket engine turbopump sandwich type labyrinth seal structure |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD82645A (en) * | ||||
GB529363A (en) * | 1939-05-30 | 1940-11-19 | Alfred Smith | Improvements in or relating to sealing glands |
US2646296A (en) * | 1944-06-14 | 1953-07-21 | Destoumieux Paul | Packing for use between rotatable and fixed parts |
GB648814A (en) * | 1946-09-03 | 1951-01-10 | Crane Packing Ltd | Improvements relating to fluid-tight sealing means between rotary and non-rotary members |
US2599034A (en) * | 1947-10-09 | 1952-06-03 | Crane Packing Ltd | Sealing means between rotating and nonrotating machine parts |
AT181186B (en) * | 1952-04-17 | 1955-02-25 | Karl Wernert | Device for sealing a shaft duct |
NL266682A (en) * | 1960-07-05 | |||
US3194569A (en) * | 1960-07-05 | 1965-07-13 | Utvitch Jovan | Sealing joint axially supported by friction between parts in rotation in relation to one another in a machine |
US3532025A (en) * | 1968-10-01 | 1970-10-06 | Gleason Works | Ratio-change and set-over mechanism in bevel gear making machines |
DE6602954U (en) * | 1969-06-21 | 1969-07-10 | Wernert & Co K G Fa H | SLIP RING SEAL FOR THE SHAFTS OF CENTRIFUGAL MACHINES. |
FR2102890A6 (en) * | 1970-08-27 | 1972-04-07 | Gueytron Jean Claude | |
FR2182272A5 (en) * | 1972-04-24 | 1973-12-07 | Peugeot & Renault | |
DE2411055C2 (en) * | 1974-03-08 | 1983-01-13 | Bernard Victor Mansfield Nottinghamshire Cadman | Sealing arrangement for shafts |
-
1976
- 1976-04-10 DE DE2615743A patent/DE2615743C2/en not_active Expired
-
1977
- 1977-03-22 FI FI770903A patent/FI64449C/en not_active IP Right Cessation
- 1977-03-22 SE SE7703268A patent/SE429466B/en not_active IP Right Cessation
- 1977-03-24 AT AT207077A patent/AT348873B/en active
- 1977-03-31 DK DK142977A patent/DK143146C/en not_active IP Right Cessation
- 1977-03-31 BE BE176312A patent/BE853109A/en not_active IP Right Cessation
- 1977-04-04 CH CH423077A patent/CH620970A5/en not_active IP Right Cessation
- 1977-04-04 NO NO771185A patent/NO149217C/en unknown
- 1977-04-04 GB GB14089/77A patent/GB1535678A/en not_active Expired
- 1977-04-06 NL NL7703793A patent/NL7703793A/en not_active Application Discontinuation
- 1977-04-07 IT IT22238/77A patent/IT1084470B/en active
- 1977-04-08 FR FR7710782A patent/FR2347589A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
CH620970A5 (en) | 1980-12-31 |
SE7703268L (en) | 1977-10-11 |
FI64449C (en) | 1983-11-10 |
FR2347589A1 (en) | 1977-11-04 |
FI770903A (en) | 1977-10-11 |
DK142977A (en) | 1977-10-11 |
BE853109A (en) | 1977-07-18 |
DK143146B (en) | 1981-06-29 |
DE2615743A1 (en) | 1977-10-20 |
FR2347589B1 (en) | 1983-06-10 |
DE2615743C2 (en) | 1984-07-12 |
NO771185L (en) | 1977-10-11 |
FI64449B (en) | 1983-07-29 |
ATA207077A (en) | 1978-07-15 |
AT348873B (en) | 1979-03-12 |
NL7703793A (en) | 1977-10-12 |
DK143146C (en) | 1981-11-16 |
SE429466B (en) | 1983-09-05 |
GB1535678A (en) | 1978-12-13 |
IT1084470B (en) | 1985-05-25 |
NO149217C (en) | 1984-03-07 |
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